Model# KDF-42WE655 Sony TV- front screen has hundreds of tiny blue lights with solid blue running up the left side and now in center of screen it appears yellow light when turned on size almost the full screen

you need to replace the light engine on your set, check on ebay for a good price.

You have a Bad Optical Assy unit/Light Engine, PN# A-1084-658-A Price $1,692.39
after core refund $1,000.00 Part $692.39 Encompass Parts Distribution 1-800-638-3328

I hear that Sony will offer you a Deal on Brand New LCD ? 239-768-7547
(888)-649-7669

The blue shadow is a sign of a bad light engine. this is a common problem for this model. Fixing this type of problem is quite expensive. Light engine Costs you several hundred of dollars nearly to the price of new TV set.

The light engine (the projector part of tv) is failing. A common problem, but very expensive as you have to replace the entire engine, can't be repaired. Check with Sony to see if this model is still under their extended warranty or not. If so they'll fix it for free, if not be prepared to pay several hundred dollars at the least. At that point you'd probably be better off buying a new TV.

this is the information I received

This blue dots problem is due to defective blue lcd and related uv filters/ polarizers in optic block (light engine) and optic block will be replace to fis that issue.
It would be costly fix and an experienced tech is needed to do the job. You can expect $1000 repair cost.
Thanks.

Bad Light Engine/optical ASSY Encompass Parts Distribution 1-800-638-3328

it is the light engine you can check with sony they may replace it under warranty if the set is less than 5 years old

Defective light engine. Try contacting Sony costumer support because on some models they extended the light engine warranty. :)

WON'T STOP WORKING BUT IT WILL GET WORSE, THE LIGHT ENGINE IS GOING BAD

replace the cold cathode(s) that lights your display it is like a small florescent lamp